"(Sanchez) was tough," Villarreal said. "It was hard. She was really strong and she was able to keep me down pretty well."

Villarreal (40-0) said the key to her success was the move up in weight class.

"Over the summer I put weight on and I couldn't get it off, and so I was like, 'Well, why not? I'll try it,' and it just went well," Villarreal said. "It just went so good, and I was like, 'I might as well stay here,' and I think it was the best choice for me."